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href="/blog/blogs/Vue/Vue2_2022111206.html" class="nav-link series-item" aria-label="六、前后端交互"><!--[--><!--]--> 六、前后端交互 <!--[--><!--]--></a><!--]--></li><li><!--[--><a href="/blog/blogs/Vue/Vue2_2022111207.html" class="nav-link series-item" aria-label="七、前端路由"><!--[--><!--]--> 七、前端路由 <!--[--><!--]--></a><!--]--></li><li><!--[--><a href="/blog/blogs/Vue/Vue2_2022111208.html" class="nav-link series-item" aria-label="八、前端工程化"><!--[--><!--]--> 八、前端工程化 <!--[--><!--]--></a><!--]--></li><li><!--[--><a href="/blog/blogs/Vue/Vue2_2022111209.html" class="nav-link series-item" aria-label="九、其他"><!--[--><!--]--> 九、其他 <!--[--><!--]--></a><!--]--></li><li><!--[--><a href="/blog/blogs/Vue/Vuex_2022111301" class="nav-link series-item" aria-label="Vuex"><!--[--><!--]--> Vuex <!--[--><!--]--></a><!--]--></li><li><!--[--><a href="/blog/blogs/Vue/Vuex_2022111301.html" class="nav-link series-item" aria-label="一、Vuex概述"><!--[--><!--]--> 一、Vuex概述 <!--[--><!--]--></a><!--]--></li><li><!--[--><a href="/blog/blogs/Vue/Vuex_2022111302.html" class="nav-link series-item" aria-label="二、Vuex的基本使用"><!--[--><!--]--> 二、Vuex的基本使用 <!--[--><!--]--></a><!--]--></li><li><!--[--><a href="/blog/blogs/Vue/Vuex_2022111303.html" class="nav-link series-item" aria-label="三、Vuex的核心概念"><!--[--><!--]--> 三、Vuex的核心概念 <!--[--><!--]--></a><!--]--></li><li><!--[--><a href="/blog/blogs/Vue/Vue3_2022111301" class="nav-link series-item" aria-label="Vue3"><!--[--><!--]--> Vue3 <!--[--><!--]--></a><!--]--></li><li><!--[--><a href="/blog/blogs/Vue/Vue3_2022111301.html" class="nav-link series-item" aria-label="Vue3啦啦啦"><!--[--><!--]--> Vue3啦啦啦 <!--[--><!--]--></a><!--]--></li></ul></section><!--]--><!--]--></aside><!--[--><main class="page-container show-series show-catalog"><h1 class="page-title">五、组件化开发</h1><div class="page-info"><a class="icon-container left" href="javascript:void(0)" target="_self"><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24" 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xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24" style="color:inherit;width:18px;height:18px;font-size:18px;"><path d="M5 4h4l3 3h7a2 2 0 0 1 2 2v8a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></path></svg><span style="color:inherit;font-size:14px;" class="icon-text"><!--[-->前端<!--]--></span></a><a class="icon-container left" href="javascript:void(0)" target="_self"><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24" style="color:inherit;width:18px;height:18px;font-size:18px;"><g fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="8.5" cy="8.5" r="1" fill="currentColor"></circle><path d="M4 7v3.859c0 .537.213 1.052.593 1.432l8.116 8.116a2.025 2.025 0 0 0 2.864 0l4.834-4.834a2.025 2.025 0 0 0 0-2.864L12.29 4.593A2.025 2.025 0 0 0 10.859 4H7a3 3 0 0 0-3 3z"></path></g></svg><span style="color:inherit;font-size:14px;" class="icon-text"><!--[-->Vue<!--]--></span></a><!----></div><div class="theme-reco-default-content"><div><h2 id="组件化开发思想" tabindex="-1"><a class="header-anchor" href="#组件化开发思想" aria-hidden="true">#</a> 组件化开发思想</h2><blockquote><p>组件之间单独开发 很多个功能组件组成一个手机 如果想换手机 很多模块还可以回收或者重新组合</p></blockquote><h2 id="组件注册" tabindex="-1"><a class="header-anchor" href="#组件注册" aria-hidden="true">#</a> 组件注册</h2><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;script&gt;
Vue.component(&#39;a-b组件名&#39;, {
  data:function(){
    return {count:0}//组件数据
  })，
 template:&#39;&lt;div @click=&quot;count&quot;&gt;click了{{count}}次&lt;/div&gt;&#39;//组件模板内容
})
&lt;/script&gt;
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="组件用法" tabindex="-1"><a class="header-anchor" href="#组件用法" aria-hidden="true">#</a> 组件用法</h2><div class="language-vue ext-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>a-b</span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>a-b</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>组件注册的注意事项 <ul><li>注册组件的时候data必须是一个函数</li><li>组件模板内容必须是单个根元素 1个div包含所有</li><li>组件模板内容可以是模板字符串 template里面用<code>反引号</code>包含。</li><li>组件命名方式 <ul><li>短横线方式 <ul><li><code>Vue.component(&#39;my-component-name&#39;, {/* ... */})</code></li><li>规范使用短横线方式 如果是HelloWorld 可以转换成<code>&lt;hello-world&gt;</code>都小写+&#39;-&#39;</li><li>驼峰方式++<code>Vue.component(&#39;MyComponentName&#39;, {/* ... */})</code> 只能在字符串模板中使用</li></ul></li></ul></li></ul></li><li>局部组件注册 <em>局部组件只能在注册他的父组件中使用</em></li></ul><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>&lt;script &gt;
var ComponentA= {/ ... /}
new Vue({
  el:&#39;#app&#39;,
  components: {
    &#39;component-a&#39;:ComponentA
  }
})
&lt;/script&gt;
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>Vue调试工具用法 ：<em>谷歌插件</em></li><li>组件间数据交互 <em>props传递数据原则：单向数据流</em><ul><li>父组件向子组件传值 <ul><li>子组件-&gt;组件内部通过props接受传递过来的值<br><code>&lt;script&gt; Vue.component(a-b,{ props:[&#39;title&#39;], template:&#39;&lt;div&gt;{{title}}&lt;/div&gt;&#39; }) &lt;/script&gt;</code></li><li>父组件通过属性将值传递给子组件<br><code>&lt;a-b :title=&quot;newVal&quot;&gt;&lt;/a-b&gt;</code></li><li>props属性名规则 <ol><li>在props中使用驼峰形式，模板中需要使用短横线的形式</li><li>字符串形式的模板中没有这个限制<code>props:[newTitle]</code> -&gt; <code>&lt;a-b :new-title=&quot;sz&quot;&gt;&lt;/a-b&gt;</code></li></ol></li><li>props属性值类型 <ol><li>字符串 String</li><li>数值 Number</li><li>布尔值 Boolean</li><li>数组 Array</li><li>对象 Object</li></ol></li></ul></li><li>子组件向父组件传值 <ul><li>自定义事件向父组件传值 传参 <ul><li>子组件<code>&lt;button @v-on:click=&#39;$emit(&quot;x-t,args...&quot;)&#39;&gt;xx&lt;/...&gt;</code></li><li>父组件<code>&lt;a-b @v-on:x-t=&#39;x++$event&#39;&gt;dd&lt;/...&gt;</code><em>$event用来接收args参数</em></li></ul></li></ul></li><li>非父子组件之间传值 <ol><li>单独的事件中心管理组件间的通信<code>var hub = new Vue()</code></li><li>监听事件与销毁事件 <code>hub.$on、hub.$off(x,fun...)</code></li><li>触发事件<code>hub.$emit(&#39;函数名称&#39;,参数)</code></li><li>传递 provide。接收inject 。++Vue2里 和computed(){}同级</li></ol></li></ul></li></ul><div class="language-vue ext-vue line-numbers-mode"><pre class="language-vue"><code>provide:() {return{app:&#39;vvv&#39;}
inject:[&#39;app&#39;]
Vue3里直接在setup(){里面写 `provide(&#39;age&#39;,18)`},&amp; 子组件 `inject(&#39;age)`
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>组件插槽 <ul><li>组件插槽的作用 <em>父组件向子组件传递内容(模板的内容不是数据的交互)</em></li><li>组件插槽的基本用法 <em>可以有默认但是会被覆盖</em><ul><li>子组件：<code>&lt;slot&gt;aaa/bbb&lt;/slot&gt;</code></li><li>父组件：<code>&lt;a-b&gt;aaa&lt;/a-b&gt;/&lt;a-b&gt;bbb&lt;/a-b&gt;</code></li></ul></li></ul></li></ul><ol><li>具名插槽的用法 <em>有名字的插槽</em></li></ol><div class="language-vue ext-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
 <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
   <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>slot</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>slot1<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>slot</span><span class="token punctuation">&gt;</span></span>
   <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>slot</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>slot2<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>slot</span><span class="token punctuation">&gt;</span></span>
 <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
 <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span> <span class="token attr-name">slot</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>slot1<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>slot1内容<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
 <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>p</span> <span class="token attr-name">slot</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>slot2<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>slot2内容<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>p</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ol start="2"><li>作用域插槽 <em>应用场景：父组件对子组件的内容进行加工处理</em></li></ol><ul><li>插槽的定义 <ul><li>子组件 ：<code>&lt;ul&gt;&lt;li v-for=&quot;item in list&quot;&gt;&lt;slot v-bind:info=&quot;item&quot;&gt;.{{item.name}}..&lt;/...&gt; </code> <em>info是自定义的</em></li><li>父组件：<code>&lt;div&gt;&lt;template slot-scope=&quot;slotProps&quot;&gt;&lt;span&gt;{{slotProps.info.name}}...</code></li></ul></li></ul></div></div><footer class="page-meta"><div class="meta-item edit-link"><a class="icon-container left meta-item-label" href="https://gitee.com/i77ing/blog.git/edit/master/blogs/Vue/Vue2_2022111205.md" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24" style="color:inherit;width:20px;height:20px;font-size:20px;"><g fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M9 7H6a2 2 0 0 0-2 2v9a2 2 0 0 0 2 2h9a2 2 0 0 0 2-2v-3"></path><path d="M9 15h3l8.5-8.5a1.5 1.5 0 0 0-3-3L9 12v3"></path><path d="M16 5l3 3"></path></g></svg><span style="color:inherit;font-size:14px;" class="icon-text"><!--[-->Edit this page<!--]--></span></a></div><div class="meta-item last-updated"><a class="icon-container left meta-item-label" href="javascript:void(0)" target="_self"><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24" style="color:inherit;width:20px;height:20px;font-size:20px;"><g fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M11.795 21H5a2 2 0 0 1-2-2V7a2 2 0 0 1 2-2h12a2 2 0 0 1 2 2v4"></path><circle cx="18" cy="18" r="4"></circle><path d="M15 3v4"></path><path d="M7 3v4"></path><path d="M3 11h16"></path><path d="M18 16.496V18l1 1"></path></g></svg><span style="color:inherit;font-size:14px;" class="icon-text"><!--[-->Last Updated 2023-02-23 19:57:37<!--]--></span></a></div></footer><nav class="page-nav"><p class="hasPrev hasNext inner"><span class="page-nav-item prev"> ← 四、Vue常用特性</span><span class="page-nav-item next">六、前后端交互 → </span></p></nav><!----></main><!--]--><div class="page-catalog-container"><h5 class="tip">ON THIS PAGE</h5><ul><!--[--><!--[--><li class="page-catalog-menu-depth_2"><a aria-current="page" href="/blog/blogs/Vue/Vue2_2022111205.html#组件化开发思想" class="router-link-active router-link-exact-active nav-link page-catalog-item" aria-label="组件化开发思想"><!--[--><!--]--> 组件化开发思想 <!--[--><!--]--></a></li><!--]--><!--[--><li class="page-catalog-menu-depth_2"><a aria-current="page" href="/blog/blogs/Vue/Vue2_2022111205.html#组件注册" class="router-link-active router-link-exact-active nav-link page-catalog-item" aria-label="组件注册"><!--[--><!--]--> 组件注册 <!--[--><!--]--></a></li><!--]--><!--[--><li class="page-catalog-menu-depth_2"><a aria-current="page" href="/blog/blogs/Vue/Vue2_2022111205.html#组件用法" class="router-link-active router-link-exact-active nav-link page-catalog-item" aria-label="组件用法"><!--[--><!--]--> 组件用法 <!--[--><!--]--></a></li><!--]--><!--]--></ul></div></div></div></div><!----><!----><!--]--></div>
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